【摘要】：近年來(lái),隨著OLED(Organic Light-Emitting Diode,有機(jī)發(fā)光二極管)產(chǎn)業(yè)化步伐的加快,面板企業(yè)紛紛布局OLED產(chǎn)線,相關(guān)的研究特別是屬于產(chǎn)業(yè)鏈上游的材料研究也成為研發(fā)重點(diǎn)。其中,作為下一代發(fā)光層材料的TADF(Thermally Activated Delayed Fluorescence,熱活化延遲熒光)材料以其易制備、低成本且保持較高發(fā)光性能等優(yōu)勢(shì)成為研究中的重要部分。作為分子間TADF材料體系的激基復(fù)合物型延遲熒光體系以其更易實(shí)現(xiàn)較小的單線態(tài)和三線態(tài)能級(jí)差逐漸得到越來(lái)越多科研工作者的關(guān)注,我們課題組在研究中發(fā)現(xiàn),具有對(duì)稱氰基取代特點(diǎn)的SFX類材料通過(guò)和4,4',4''-三(咔唑-9-基)三苯胺(TCTA)摻雜可以實(shí)現(xiàn)激基復(fù)合物型的熱活化延遲熒光發(fā)射。同時(shí),我們也注意到SFX的衍生物已經(jīng)在光電器件和延遲熒光器件中得到應(yīng)用和報(bào)道。在本文中,我們?cè)诒Ａ魧?duì)稱氰基取代特點(diǎn)的基礎(chǔ)上,通過(guò)變換芴基骨架的位阻基團(tuán)和構(gòu)型等因素,研究具有對(duì)稱氰基取代的非平面芴基結(jié)構(gòu)材料與實(shí)現(xiàn)激基復(fù)合物型熱活化延遲熒光之間的構(gòu)效關(guān)系。首先,我們從具有對(duì)稱氰基取代芴這一結(jié)構(gòu)單元出發(fā),通過(guò)變換芴的9位上不同的空間位阻單元,制備出一系列具備對(duì)稱氰基特點(diǎn)的位阻型芴基結(jié)構(gòu)化合物。我們通過(guò)將其和4,4',4''-三(咔唑-9-基)三苯胺(TCTA)摻雜,對(duì)其光物理性質(zhì)進(jìn)行系統(tǒng)研究。我們通過(guò)研究發(fā)現(xiàn)不同的位阻基元對(duì)實(shí)現(xiàn)激基復(fù)合物型熱活化延遲熒光有一定的影響規(guī)律。其次,我們進(jìn)一步改變分子骨架結(jié)構(gòu)并設(shè)計(jì)了三種“H”型分子結(jié)構(gòu)分子,研究分子構(gòu)型的改變對(duì)延遲熒光性質(zhì)的影響。作為對(duì)比,我們又設(shè)計(jì)制備了單臂取代的對(duì)比分子,進(jìn)一步證明分子骨架(“H”型)對(duì)延遲熒光性質(zhì)的影響作用。最后,考慮到分子間延遲熒光分子和單分子延遲熒光分子在制備有機(jī)發(fā)光器件時(shí)存在的摻雜和主客體體系帶來(lái)的工藝問(wèn)題,我們從激基復(fù)合物型熱活化延遲熒光給受體材料的角度出發(fā),設(shè)計(jì)和構(gòu)筑主客體一體化的延遲熒光分子。
[Abstract]:In recent years, with the acceleration of the industrialization of OLED (Organic Light-Emitting Diode, organic light-emitting diodes (OLEDs), the panel enterprises have laid out the OLED production lines, and the related research, especially the research of materials in the upstream of the industrial chain, has also become the focus of research and development. Among them, TADF (Thermally Activated Delayed Fluorescence, thermal activated delayed fluorescence (TADF (Thermally Activated Delayed Fluorescence,), as the next generation luminescent layer material, has become an important part of the research because of its advantages of easy preparation, low cost and high luminescence performance. As an intermolecular TADF material system, the excimer complex type delayed fluorescence system has been paid more and more attention by more and more researchers because of its easy realization of smaller single-line and three-line energy difference. The thermal activation delay fluorescence emission of the exciplex type of SFX materials with symmetric cyano substitutions can be achieved by doping with 4C4C4C4C4-trianiline (carbazolyl) trianiline (TCTA). At the same time, we also note that the derivatives of SFX have been applied and reported in optoelectronic devices and delayed fluorescence devices. In this paper, on the basis of preserving the characteristic of symmetric cyanide substitution, we change the steric resistance group and configuration of fluorene skeleton. The structure-activity relationship between the non-planar fluoresce-based materials with symmetric cyanoyl substitutions and the delayed fluorescence with excimer type thermal activation was studied. Firstly, starting from the symmetric cyano-substituted fluorene structure unit, a series of sterically hindered fluorenyl compounds with symmetric cyanoyl groups were prepared by transforming different steric blocking units of fluorene at the 9 position of fluorene. The photophysical properties of (TCTA) were systematically studied by doping it with 4K4 (carbazolyl) trichloroaniline (TCTA). We found that different steric resistance units have certain influence on the realization of delayed fluorescence of excimer type thermal activation. Secondly, we further change the molecular skeleton structure and design three kinds of "H" type molecular structure molecules to study the influence of the molecular configuration changes on the delayed fluorescence properties. As a contrast, we have designed and prepared one-arm substituted contrast molecules, which further prove the effect of molecular skeleton ("H" type) on the delayed fluorescence properties. Finally, considering the process problems caused by doping and host guest system in the fabrication of organic luminescent devices by intermolecular delayed fluorescence molecules and monolayer delayed fluorescence molecules, We design and construct a host and guest integrated delayed fluorescence molecule from the perspective of the excimer thermal activation delay fluorescence to the receptor material.
【學(xué)位授予單位】：南京郵電大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN383.1;TN104.3

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